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auger cast piles

auger cast piles

auger cast piles

(OP)
How close can I drill to an underground duct bank with auger cast piles?

Thanks,

RE: auger cast piles

I'd do a test at a location where you have room. Install thin walled metal conduit pipe at different distances from a planned auger cast pile. The purpose of these would be to see if they deflect or are damaged as the drill for the pile as it goes by and while withdrawing. Or use a pipe type that can break when deflected. I had a series of pvc pipes installed in a "fence" in the path of a drilled tunnel where there was a chlorine line buried a little farther ahead. Purpose was to verify that the tunnel was low enough to avoid hitting the chlorine pipe. It worked well.

RE: auger cast piles

Next topic: How to see what is happening. It depends on what you are concerned with. The least I would do is have a few different sized dowels, maybe a few feet long and lower them on a measuring tape and judge what is going on accordingly. This can get very fancy if you wish.

RE: auger cast piles

(OP)
Thanks for the input. But I was wondering more if there was a spec about how far laterally you can be from a duct bank

RE: auger cast piles

Rule of thumb for pile-to-pile is 3 pile diameters. Using same should be ok.

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